Re: [rtcweb] Video Codec Selection Plan

Iñaki Baz Castillo <ibc@aliax.net> Fri, 13 September 2013 18:01 UTC

Return-Path: <ibc@aliax.net>
X-Original-To: rtcweb@ietfa.amsl.com
Delivered-To: rtcweb@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 0E2B421E811A for <rtcweb@ietfa.amsl.com>; Fri, 13 Sep 2013 11:01:02 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -2.676
X-Spam-Level:
X-Spam-Status: No, score=-2.676 tagged_above=-999 required=5 tests=[BAYES_00=-2.599, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001, MIME_8BIT_HEADER=0.3, RCVD_IN_DNSWL_LOW=-1]
Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id CUCY8rfZ8jqY for <rtcweb@ietfa.amsl.com>; Fri, 13 Sep 2013 11:00:55 -0700 (PDT)
Received: from mail-qe0-f54.google.com (mail-qe0-f54.google.com [209.85.128.54]) by ietfa.amsl.com (Postfix) with ESMTP id 0772021E80D8 for <rtcweb@ietf.org>; Fri, 13 Sep 2013 11:00:13 -0700 (PDT)
Received: by mail-qe0-f54.google.com with SMTP id cy11so1276433qeb.13 for <rtcweb@ietf.org>; Fri, 13 Sep 2013 11:00:05 -0700 (PDT)
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type; bh=tzvl/xfgaTYyOpx7zJyjhpJQUCcchloPGCPTNS6URrg=; b=dYt93ZtwjSEDObCB/SDpMYlQ+30mIunnq6n6XT4yvs67fwCSRSQ5uX2iFhQfn+gXb3 JI/OOj9ojvJ7h4rSMJtUIuJHNN95igMYf1AjpRshKAyDk4wTVDacwIZvvESJg5rc6PPT qSPJvveP87dWZLkC5gAPT7dgiXy98ZLjiLfqwZZkWxrv8o/s6TdRQyXqobH3qgloEX6S Ynq+bd6sZsxbSksE7HqVB3g+tR2O6YY6koRhKjdUMSHkYcDkPXFmAyw0BgNvFEJO/MDe 7i8XBM4LKjUUISalPtW8BUJBLoGqrd3g/CzQjFbWh/MfOhT5s7RIpKkw2YJNxX7mXPer CiFw==
X-Gm-Message-State: ALoCoQlpSafAD1g+jHUGjzEDu6Tg7PVDzs8j5GZYGUekgxqON2JwRd/C8Pi+ZCyFYUYJUQxoNI0V
MIME-Version: 1.0
X-Received: by 10.229.24.130 with SMTP id v2mr27301537qcb.15.1379095205516; Fri, 13 Sep 2013 11:00:05 -0700 (PDT)
Received: by 10.49.16.71 with HTTP; Fri, 13 Sep 2013 11:00:05 -0700 (PDT)
Received: by 10.49.16.71 with HTTP; Fri, 13 Sep 2013 11:00:05 -0700 (PDT)
In-Reply-To: <52334E48.8040703@thaumas.net>
References: <CA+9kkMAvdtq_gufKmDNCNCL+kKcxyi0MGUoVHetd9_DzbEdEnA@mail.gmail.com> <52334462.608@matthew.at> <52334E48.8040703@thaumas.net>
Date: Fri, 13 Sep 2013 20:00:05 +0200
Message-ID: <CALiegfkLafcMMboVJbD=ONFVekh8t=qCfF59C10sj1rfEsUEXA@mail.gmail.com>
From: Iñaki Baz Castillo <ibc@aliax.net>
To: Ralph Giles <giles@thaumas.net>
Content-Type: multipart/alternative; boundary="001a1133b8fcd652e404e6479fdd"
Cc: rtcweb@ietf.org
Subject: Re: [rtcweb] Video Codec Selection Plan
X-BeenThere: rtcweb@ietf.org
X-Mailman-Version: 2.1.12
Precedence: list
List-Id: Real-Time Communication in WEB-browsers working group list <rtcweb.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/rtcweb>, <mailto:rtcweb-request@ietf.org?subject=unsubscribe>
List-Archive: <http://www.ietf.org/mail-archive/web/rtcweb>
List-Post: <mailto:rtcweb@ietf.org>
List-Help: <mailto:rtcweb-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/rtcweb>, <mailto:rtcweb-request@ietf.org?subject=subscribe>
X-List-Received-Date: Fri, 13 Sep 2013 18:01:02 -0000

El 13/09/2013 19:41, "Ralph Giles" <giles@thaumas.net> escribió:
>
> On 13-09-13 9:59 AM, Matthew Kaufman wrote:
> > 1. Please explain why this decision is an IETF decision and not a W3C
> > decision, given that it is a choice about what to mandate in the
> > presentation layer as codec, NOT what to mandate for the on-the-wire
> > transport format (which has already been selected as DTLS-SRTP with an
> > appropriate IETF payload based on the application)
>
> This working group selected OPUS and G711 as MTI audio codecs to avoid
> session negotiation failure. Session negotiation being part of the
> WebRTC protocol suite being specified within the IETF.
>
> The same arguments apply to a video codec. If we can find rough
> consensus to specify one it is useful to do so.

One error does not justify another one.